While under heavily armed guard, the dangerous convicts aboard a cargo ship unite in a coordinated escape attempt that soon escalates into a bloody, all-out riot. But as the fugitives continue their brutal campaign of terror, they soon discover that not even the most vicious among them is safe from the horror they unknowingly unleashed from the darkness below deck.
Man-hee, imprisoned for being caught up in an accidental violent case, will be admitted to a violent room where the king of prison can be found. On the other hand, with Tae-soo, the opposition leader being admitted to the same prison, a group of people who are unhappy with the king gather one by one, and the gang members face a desperate crisis.